My rings are bespoke so they can be made in any number of tiers and to any size you request.The diameter of the gold and sterling silver wire used is 1.5 mm.HEAVY COSMIC rings use 2.0mm sterling silver wire.VERMEIL rings use sterling silver wire then hand dipped it in 18 carat gold.OMBRE rings are silver, partially hand dipped in 18 carat gold.KEZIA earrings use 0.8mm silver wire